So, looking at Figure 1, if we started rapidly removing carbon from the atmopshere, the temperatures should reflect within a year or two, and if we removed ALL of the anthropogenic delta-CO$_2$, we could expect temperatures to go back to pre-industrial revolution plus or minus any natural changes since then in about 10 years.

A side note: supposing we could sequester as much carbon as we put into the atmosphere every year. That would be great! But how much energy would it take to sequester that carbon? And where would we get the energy to sequester the carbon. Sequestration seems like a great idea, but I don't think it would work, even if an excellent method of sequestration could be found, until the world's energy demands are met from non-fossil fuel sources.